Blotting.



J. MlBURBY.

BLOTTING.

APPLICATION FILED MAR.12,1910.

1994567, Patented June 6, 1911.

$140 alto Lump lh all whom it may concern:

CAGQ, ILLINOIS.

BLOTTING.

Specification of Application filed March 12 was:

Be it known that I, JOHN M. BURBY, a I citizen of the United States, and a resident of Elizabeth, county of Union, and State of New Jersey, have invented a certain new and useful Improvement in the Manufacture ofBlotting, of which the following is a full, clear, and exact specification.

My invention relates to paper making and consists of the improved manufacture of blotting, whereby such blotting is produced in one operation, the gluing or pasting of the lining uponthe blotting being entirely dispensed with, and a superior product obta'ined at less cost and less expenditure of labor and material.

Blotting is produced of maceratedr'ags and soda pulp, also raw cotton sweepings from gin mills being utilized in its manuacture. To produce coated blotting, for which there is a large demand, it is necessary to cover the surface, upon which this coating is to be applied, by a layer of material upon which the coating is applied, because of the absorbent nature of blotting no coating can be applied immediately upon it, as the coating composition would percolate it and spoil the blotting by making it unfit for its intended use. This non-absorbent layer 'is called the liner and must be made of material capable of holding the coating composition while it is being ap plied thereon. Heretofore the blotting andthe lining was produced in separate sheets completely finished on the respective. machines, and made up in rolls. These rolls are then placed on lining machines, where the liner is affixed to the blotting by glue, starch or casein paste,- and then the lined blotting run into the-coating machine; Being thoroughly familiar-with the manufact-ure of blotting and also of all kinds of soscalied combination boards. which are composed of two or more layers of difl'erent materials, I have experimentedwith the object in view, to determine whether the lining layer, required to be applied upon blot-' ting to make it suitable for coating, could notbe applied thereon during the process of manufacture of the blotting, and have produced blotting with a layer of nonabsorbent material, suitable to receive the coating, saitely united with the blotting, the blotting and the lining sheets. being felted together in the process of its manufacture.

,' 1910. Serial No. 548,858.

' Such machines, as are now used for the. manutacture oi the so-called combination,

boards, are wellsuitable for the manufacwith the inders.

requisite number of vats andcylaccompanying drawing, wherein-;

lower, and the direction of their travel isindicated by arrows.

be used for the body of the blotting. andv the be reversed, that is to say, the vats A and B may be used'for the liner and vats C, I) and E 'for' the blotting. In the first instance the liner willbe run on the upper, and

-mate and stronger binding together of the layers is effected For the same reason it is also preferable to use pulp, or news material, for the layer of the liner coming next 5 to the body of the blotting, manila material Letter P ten Patented June it, 1911i.

ture of myimproved blotting, if provided A machine of this kind is shown diagrammatically 1n a sectional view on the A, B, C, D and E designate the vats, G' C C C and C the cylinders, mounted torevolve therein, anda, b, 0, (Z and e their. respective couch-.rolls.- The felt-s are designated by u for the'upper 'and Z for. the

ing, the ,vats A, B and C (for instance) may in the second, on the lower surface ofthe and not the blotting layers upon the.

being more desirable for the surface layer NEW JERSEY, ASSIGNOR OF ONE-HALF TO FRITZ ii-f1.

. Reference letters 29,1) to p and P, P',YP.

vats D andE for the liner. Theorder may when thela'stly made and onlyonoe the fibers is facilitated, and a more mt'n of the liner whereonthe coating is applied; this is, however, not essential, my experiments and experience having demonstrated,

that an equally satisfactory result is obtained if the liner is produced of one kind of material, provided that the supply of the stuff in the vats, from which the liner layers are produced. is properly regulated.

The material (stuff), of which the blot-- tingand the lining areto be made, is delivered into the'vats .A, 1B,- C, etc., and from there taken up by the lower felt Z as it runs over the cylinders, being pressed thereon by the respective couch-rolls a, b, 0, etc. In this way the composite sheet of blotting and lining is successively built up, the component layers of each, and the sheets of blotting and lining being felted together. The compound sheet thus produced, that is, the body of the blotting with the liner applied thereto by interfelting the fibers of the first liner layer with the lastblotting layer, is" .thencompacted between the upper and lower felts, as it is run between the pressrolls p, p, 71 etc., 10 a large proportion of the water, contained therein, having been squeezed out by rolls 8 and s. The yet wet sheet is then carried,.supportedupon the auxiliary felt Z, through press-rolls P and over guide-rolls g and 9 between press- -rolls P and from there over guide rolls g and g, on to the driers D, D, etc. By the time the sheet leaves the lower felt Z, it has "attained sufiicient cohesive strength to stand such strain as is required'to draw it, by press-rolls P over the guide-rolls g and .The auxiliary upper felt it is employed to act as a carrier for the composite sheet during this transmission. The sheet is then drawn upon and between the driers D, a sufficient number of which must be provided in the machine, to. completely dry the composite sheet, evaporate all moisture.

therefrom, during its passage. From the driers the'composite sheet is carried over guide-roll g on to the upper roll rof thefirst calender stack, where it is finished. When carried over from the driers to the calender stack, the composite sheet is in condition to have the coating applied thereto, and for this purpose, a trough T, supported in a suitable framing t, with its open side abutting against one (preferably the second) of the upwardly turning rollers of the calender stack, is used. Thecoating composition, which may be of any desired color, is

eases? fed into the trough by gravity from a tank located above, or it may be pumped into it. As the composite sheet then progresses through the calender stack, the coating composition is pressed into, and onto its liner layer by the rolls, and forms a substantial, non-permeable coating of a very smooth and even surface. The porosity and softness of the blotting body is not affected thereby, as the coating does not permeate through the liner. The coated surface of such composite, blotting sheet may also be suitably grained, which is frequently de-,

sent, and thereby the tendency. of the glued product, to crack or break, and to split and separate at the joint of the blotting sheet to the thin, hard and brittle layer of glue, or

paste, is entirely obviated.

My improved. blotting can also be produced and used without coating,the liner produced upon the blotting by my improved process felting, being suitable therefor, and sufficiently dense to hold the ink or coloring matter, used in the print .or pressing, from penetrating through it into the blotting, also sufiiciently smooth, after the prodnot is passed through the calender stack, to print or produce embellishments thereon, with ink or colors.

I claim as my invention:

A composite sheet of blotting, having a non-absorbent liner applied on one surface thereof, the non-absorbent liner being united with the absorbent body of the blotting by an intermediate layer of news pulp stock.

the fibers thereof being interfelted'with the fibers of the non-absorbent liner and'of the blotting.

JOHN M. BURBY.

Witnesses:

VnroNIoA 'BRAUN, AGNE F. MADDEN. 

